ceph-ansible/roles/ceph-osd/tasks/check_devices.yml

---
# NOTE (leseb): current behavior of ceph-disk is to fail when the device is mounted "stderr: ceph-disk: Error: Device is mounted: /dev/sdb1"
# the return code is 1, which makes sense, however ideally if ceph-disk will detect a ceph partition
# it should exist we rc=0 and don't do anything unless we do something like --force
# As as a final word, I prefer to keep the partition check instead of running ceph-disk prepare with "failed_when: false"
# I believe it's safer
#
# regex syntax uses (pat1|pat2|...|patN) for different families of device
# names, but has a common expression for partition number at the end.
# allow 2-digit partition numbers so fast SSDs can be shared by > 9 disks
# for SSD journals.

- name: check if the device is a partition
  shell: "echo '{{ item }}' | egrep '/dev/([hsv]d[a-z]{1,2}|cciss/c[0-9]d[0-9]p|nvme[0-9]n[0-9]p)[0-9]{1,2}$'"
  with_items: devices
  changed_when: false
  failed_when: false
  register: ispartition
  when: not osd_auto_discovery

- name: check if the device is a partition (autodiscover disks)
  shell: "echo '/dev/{{ item.key }}' | egrep '/dev/([hsv]d[a-z]{1,2}|cciss/c[0-9]d[0-9]p|nvme[0-9]n[0-9]p)[0-9]{1,2}$'"
  with_dict: ansible_devices
  changed_when: false
  failed_when: false
  register: ispartition_autodiscover
  when:
    - ansible_devices is defined
    - item.value.removable == "0"
    - osd_auto_discovery

# NOTE (leseb): we must do this because of
# https://github.com/ansible/ansible/issues/4297
- name: combine ispartition results
  set_fact:
    combined_ispartition_results: "{{ ispartition if not osd_auto_discovery else ispartition_autodiscover }}"

- name: check the partition status of the osd disks
  shell: "parted --script {{ item }} print > /dev/null 2>&1"
  with_items: devices
  changed_when: false
  failed_when: false
  register: osd_partition_status
  when:
    - journal_collocation or raw_multi_journal
    - not osd_auto_discovery

- name: check the partition status of the osd disks (autodiscover disks)
  shell: "parted --script /dev/{{ item.key }} print > /dev/null 2>&1"
  with_dict: ansible_devices
  changed_when: false
  failed_when: false
  register: osd_partition_status_autodiscover
  when:
    - journal_collocation or raw_multi_journal
    - ansible_devices is defined
    - item.value.removable == "0"
    - item.value.partitions|count == 0
    - osd_auto_discovery

# NOTE (leseb): we must do this because of
# https://github.com/ansible/ansible/issues/4297
- name: combine osd_partition_status results
  set_fact:
    combined_osd_partition_status_results: "{{ osd_partition_status if not osd_auto_discovery else osd_partition_status_autodiscover }}"

- name: check the partition status of the journal devices
  shell: "parted --script {{ item }} print > /dev/null 2>&1"
  with_items: raw_journal_devices
  changed_when: false
  failed_when: false
  register: journal_partition_status
  when: raw_multi_journal

# NOTE: The following calls to sgdisk are retried because sgdisk is known to
# fully wipe a device the first time around. There is no need to halt execution
# of zapping the whole device so these try again. It is easier to use `||` to
# keep the current flow of the task.
# See: https://github.com/ceph/ceph-ansible/issues/759
- name: fix partitions gpt header or labels of the osd disks
  shell: "sgdisk --zap-all --clear --mbrtogpt -- {{ item.1 }} || sgdisk --zap-all --clear --mbrtogpt -- {{ item.1 }}"
  with_together:
    - combined_osd_partition_status_results.results
    - devices
  changed_when: false
  when:
    - journal_collocation or raw_multi_journal
    - not osd_auto_discovery
    - item.0.rc != 0

- name: fix partitions gpt header or labels of the osd disks (autodiscover disks)
  shell: "sgdisk --zap-all --clear --mbrtogpt -- '/dev/{{ item.0.item.key }}' || sgdisk --zap-all --clear --mbrtogpt -- '/dev/{{ item.0.item.key }}'"
  with_together:
    - combined_osd_partition_status_results.results
    - ansible_devices
  changed_when: false
  when:
    - journal_collocation
    - osd_auto_discovery
    - ansible_devices is defined
    - item.0.item.value.removable == "0"
    - item.0.item.value.partitions|count == 0
    - item.0.rc != 0

- name: fix partitions gpt header or labels of the journal devices
  shell: "sgdisk --zap-all --clear --mbrtogpt -- {{ item.1 }} || sgdisk --zap-all --clear --mbrtogpt -- {{ item.1 }}"
  with_together:
    - journal_partition_status.results
    - raw_journal_devices
  changed_when: false
  when:
    - raw_multi_journal
    - item.0.rc != 0

- name: check if a partition named 'ceph' exists
  shell: "parted --script {{ item }} print | egrep -sq '^ 1.*ceph'"
  with_items: devices
  changed_when: false
  failed_when: false
  register: parted
  when: not osd_auto_discovery

- name: check if a partition named 'ceph' exists (autodiscover disks)
  shell: "parted --script /dev/{{ item.key }} print | egrep -sq '^ 1.*ceph'"
  with_dict: ansible_devices
  changed_when: false
  failed_when: false
  register: parted_autodiscover
  when:
    - ansible_devices is defined
    - item.value.removable == "0"
    - osd_auto_discovery

# NOTE (leseb): we must do this because of
# https://github.com/ansible/ansible/issues/4297
- name: combine parted results
  set_fact:
    combined_parted_results: "{{ parted if not osd_auto_discovery else parted_autodiscover }}"